Naim-audio NAP 500 User Manual download pdf (Page 37)

E35

34.1 General Connections Notes

The negative input and output connections for each

channel are common. The mains earth (ground) should

always be connected regardless of what other equipment

is used in conjunction with Naim power amplifiers. This only

grounds the case and the electrostatic screen within the

transformer, and is not connected to the signal negative. In

order to avoid hum loops, the signal negative of the whole

system should be connected to the mains earth (ground)

in one place.

34.2 Protection Notes

In the NAP 300 the fan speed is increased in response to

an increase in amplifier dissipation. If the amplifier reaches

70°C due to prolonged running at high level or to airflow

being blocked, the output will be interrupted and the fan

will run at full speed until it has cooled down. This may

take a few minutes.

It is not necessary to switch the amplifier off, but it may

be advisable to mute the preamplifier or turn the volume

down to avoid surprises when it comes back on.

OPERATION OF THE AMPLIFIER’S THERMAL PROTECTION

SUGGESTS PROLONGED USE AT TOO HIGH A VOLUME LEVEL.

YOUR LOUDSPEAKERS MAY BE AT RISK IF THIS IS THE CASE.

THE VOLUME SHOULD BE REDUCED.

34 Installation and Operation

The NAP 300 and NAP 300PS should be installed on a dedicated equipment stand

intended for the purpose and should be in their final location before connecting cables or

switching on. Switch on the source and preamplifier components, with the volume turned

down, before switching on the NAP 300. The NAP 300 power button is located on the front

panel of the NAP 300PS Power Supply.

Care should be taken when siting the NAP 300 to ensure that the underside fan inlet and

rear outlet are not obstructed.

The NAP 300 and NAP 300PS are heavy and care should be taken when lifting or moving

them. Make sure that the surface they are to be placed on can support the full weight.

34.3 Loudspeaker Cable and Connectors

Only Naim Audio speaker cable should be used to

connect a loudspeaker to the output of the NAP 300.

Custom Naim Audio loudspeaker connectors are supplied

to make the connection and in order to comply with

current European safety regulations these should always

be used.

DAMAGE TO THE AMPLIFIER MAY RESULT IF “HIGH

DEFINITION” CABLE OR ANY OTHER SPECIAL CABLE IS USED

TO CONNECT THE LOUDSPEAKERS.

Ensure when connecting speakers that they are “in

phase”. That is, the positive and negative connection

orientation at both the speaker and amplifier ends of the

cable is the same for both channels.

NAP 300 Power Amplifier

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Naim-audio NAP 500 User Manual Page 37

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